I'm trying to install netrunner alongside windows 10 but I can't get it to recognize that windows is already there. All I get is a messge that it detects "no other operating system". Well, I really don't want to lose windows 10. I've tried changing the partitions as someone suggested but it had no effect.

UEFI is the new "BIOS" thingy that uses a different way to boot up and register different partitions.
By default Microsoft Windows OEM PCs come with it enabled and most probably also with secure boot which is a TPM feature that Microsoft introduced to try control what software you are able to run on your computer. See http://blogs.msdn.com/b/b8/archive/2011/09/22/protecting-the-pre-os-environment-with-uefi.aspx for Infos straight from Microsoft about UEFI Secure Boot.

In general I would recommend to disable secure boot in the BIOS/UEFI Options. (see your handbook for your computer to know how to change it)
Then you have to bootup the Live USB Stick with the UEFI Boot option. I am not sure how your bios version distinguishes between "legacy" Bios boot and UEFI boot but you can see on the booted live system with the terminal command

Code:

ls /sys/firmware/efi

if you booted in UEFI mode.
If it responds with file not found this means you booted in NON-UEFI mode.

(22nd September 2015, 10:45)leszek Wrote: UEFI is the new "BIOS" thingy that uses a different way to boot up and register different partitions.
By default Microsoft Windows OEM PCs come with it enabled and most probably also with secure boot which is a TPM feature that Microsoft introduced to try control what software you are able to run on your computer. See http://blogs.msdn.com/b/b8/archive/2011/09/22/protecting-the-pre-os-environment-with-uefi.aspx for Infos straight from Microsoft about UEFI Secure Boot.

In general I would recommend to disable secure boot in the BIOS/UEFI Options. (see your handbook for your computer to know how to change it)
Then you have to bootup the Live USB Stick with the UEFI Boot option. I am not sure how your bios version distinguishes between "legacy" Bios boot and UEFI boot but you can see on the booted live system with the terminal command

Code:

ls /sys/firmware/efi

if you booted in UEFI mode.
If it responds with file not found this means you booted in NON-UEFI mode.

Hope that helps a little.

Thanks. I appreciate the info. How do I love microsoft. Let me count the ways. NOT! Guess I'll just stick with VM.